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GB/T 23366-2009 (GBT23366-2009)

GB/T 23366-2009_English: PDF (GBT 23366-2009, GBT23366-2009)
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GB/T 23366-2009English120 Add to Cart 0--9 seconds. Auto-delivery Electrochemical performance test of lithium cobalt oxide -- Test method for discharge plateau capacity ratio and cycle life Valid GB/T 23366-2009

BASIC DATA
Standard ID GB/T 23366-2009 (GB/T23366-2009)
Description (Translated English) Electrochemical performance test of lithium cobalt oxide. Test method for discharge plateau capacity ratio and cycle life
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H71
Classification of International Standard 77.120.99
Word Count Estimation 6,639
Date of Issue 2009-03-19
Date of Implementation 2010-01-01
Quoted Standard GB/T 18287-2000
Drafting Organization CITIC Guoan MGL Power Technology Co., Ltd.
Administrative Organization National Nonferrous Metals Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2009 No.3 (Total No.143)
Proposing organization China Nonferrous Metals Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies test methods lithium-ion battery cathode material of lithium cobalt oxide discharge platform capacity ratio and cycle life. This standard applies to lithium-ion battery cathode material of lithium cobalt oxide.

Standards related to: GB/T 23366-2009

GB/T 23366-2009
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 71
Electrochemical performance test of lithium cobalt oxide -
Test method for discharge plateau capacity ratio and cycle
life
ISSUED ON: MARCH 19, 2009
IMPLEMENTED ON: JANUARY 01, 2010
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Reagents and raw materials ... 4 
4 Instruments ... 5 
5 Test steps ... 5 
6 Testing report ... 7 
Electrochemical performance test of lithium cobalt oxide -
Test method for discharge plateau capacity ratio and cycle
life
1 Scope
This standard specifies the test methods for the discharge plateau capacity ratio and
cycle life of lithium cobalt oxide cathode material for lithium ion batteries.
This standard applies to lithium cobalt oxide, for the cathode material of lithium ion
batteries.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 18287-2000 General specification of lithium-ion battery for cellular phone
3 Reagents and raw materials
3.1 Lithium cobalt oxide LiCoO2.
3.2 Lithium hexafluorophosphate LiPF6 (battery grade).
3.3 Ethylene carbonate EC (battery grade).
3.4 Diethyl carbonate DEC (battery grade).
3.5 N-methyl pyrrolidone NMP (battery grade).
3.6 Polyvinylidene fluoride PVdF (battery grade).
3.7 Acetylene black.
3.8 Meso-carbon Microspheres (MCMB).
95%, AND the acetylene black which has a mass fraction of 3% ~ 5%, as a conductive
agent. Use the polyvinylidene vinyl fluoride, which has a mass fraction of 5% ~ 7%, as
the binder. Mix the mesophase carbon microspheres, acetylene black, polyvinylidene
fluoride and N-methylpyrrolidone, to adjust the slurry. Coat the slurry evenly on the
copper foil (3.10). Dry it in an oven, at 120 °C, for not less than 12 h. Cut it into
electrode sheet, which has a length of 400 mm, a width of 41 mm, a thickness of 0.14
mm ~ 0.15 mm. Strictly control the process of mixing and coating. The area and
thickness of the electrode sheet shall be kept consistent.
5.3 Assembly of battery
The battery cell is rolled by the winding method. The square rolling needle is 23 mm ~
24 mm wide and 1.5 mm thick. The polypropylene microporous film (3.11) is used as
the separator. The positive electrode is wrapped in the separator; the negative electrode
is placed on the separator, which is aligned and wound. After packaging, perform laser
welding. Then place it in an oven, at 100 °C, for vacuum drying, for not less than 12 h.
In a drying chamber, which has a dew point temperature lower than -25 °C, use the 1
mol/L LiPF6 (3.2)/EC (3.3) + DEC (3.4) (mass ratio 1:1), as the electrolyte. Inject the
electrolyte into the battery. Seal it.
5.4 Formation of batteries
Make the 063048 type test battery. According to the mass and specific capacity of
lithium cobalt oxide, which is contained in the battery, under the condition of 25 °C ±
1 °C, use a lithium-ion battery electrochemical performance tester, to carry out 3
charge-discharge cycles. The charging-discharging system is as follows:
a) Charge-discharge current: (0.2 C) A (C is a measure of the discharge speed of the
battery; the current used for 1 h discharge is called 1 C discharge current; the
current used for 5 h discharge is called 0.2 C discharge current);
b) Charging limit voltage: 4.20 V;
c) Discharge termination voltage: 2.75 V.
5.5 Test of battery
The chemically formed 063048 type test battery is tested, by a lithium-ion battery
electrochemical performance tester. The charge-discharge system is as follows:
a) Charging limit voltage: 4.20 V;
b) Discharge termination voltage: 2.75 V;
c) Charge-discharge system: The charge-discharge cycle shall be carried out, in
accordance with the provisions of 5.3.6.2 in GB/T 18287-2000.
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